Brother MFC-T4500DW Online User's Manual page 486

If your LCD error message was repeat paper jam messages, for example [Repeat Jam Front/Rear],
do the following:
a. Lift the Jam Clear Flap, and remove the jammed paper.
b. Make sure you look carefully inside (1) for any scraps of paper.
1
When finished, continue with the next step.
5. Using both hands, use the finger holds on each side of the machine to lift the scanner cover (1) into the open
position.
1
479